Attachment for fastening watch-dials.



J. A. F. WOLF.

ATTACHMENT FOR FASTENING WATCH DIALS.

APPLIOATION FILED 001'. 22, 1912.

1, 1 14,566. Patented Oct. 20, 1914.

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' I I I Attorneys THE NORRIS PETERS 50 FHOTO-LITHQ, WASHINGTON. D, C

JOSEPH A. F. WOLF, OF SIDNEY, NEBRASKA.

ATTACHMENT FDR FASTENING WATCI-I-DIALS.

Specification of Letters Patent.

Patented Oct. 20, 1914.

Application filed October 22, 1912. Serial N 0. 727,260.

To all whom it may concern Be it known that'I, J osnrrr A. Fr WOLF, a citizen of the United States, residing at Sidney, in the county of Cheyenne and State of Nebraska, have invented a new and useful Attachment for Fastening VVatch-Dials, of which the following is a specification.

My invention relates to an improved means for fastening watch dials and has for its object to provide a fastening means which will insure the dial being attached to the movement plate in an absolute rigid and stationary manner.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention .herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the drawings accompanying this specification Figure 1 is a perspective view of the dial with the fastening means attached thereto. Fig. 2 is a side view showing my improved fastening means in position. Fig. 3 is a side sectional view of the same. Fig. 4 is a fragmental view in section illustrating the dial and fastening means secured to a watch case.

My improved means for fastening a dial to the movement plate, consists in providing the dial plate 10 with three plate-like projections or lugs 14. The dial plate 10 is to be mounted upon and secured to the movement plate 13 and with this view the movement plate is provided with the usual lowered portion 12 which is adapted to fit within an annular watch member, not shown. In order to secure my dial to the movement plate, suitable slots are cut in the movement plate of the exact size as the lugs or plate-like projections 1 1, the positions of the slots being such that when the lugs are positioned therein, they will lie flush with the lowered portion 12 thus providing the portion 12 with a continuous surface.

The plate-like lugs or projections 14 are provided with apertures 15 extending transversely therethrough. The walls of said apertures are beveled for a limited distance in order that the screws 17 may fit within and lie flush with the said projections. The platelike projections are formed of steel or other suitable metal and are soldered and thus securely held to the lower surface of the dial plate 10.

By providing the dial plate with the above described projections and by providing the movement plate with the slots and positioning the projections therein it will be impossible for the dial to shift with relation to the movement plate other than to be raised directly therefrom, and in order to prevent this latter movement, screws 17 are provided which engage the threaded holes 16 in the movement plate. These screws pass through the apertures 15 formed in the dial plate projections and their heads lie flush with the outer surface thereof. With the projections in position in the slots, and the screws in position, any force tending to shift the dial is taken up directly by the said projections and any force tending to raise the dial away from the movement plate results in a shearing force upon the screw shank and therefore there will be no tendency for the threaded holes becoming enlarged and the screws working loose.

By providing the screws with beveled heads, it allows the lower portion 12 of the movement plate to fit within an annular watch member (not shown) and this member will prevent the screws 17 from working loose or coming out.

Thus I have embodied in my improved dial fastener the desirable features of effectually preventing any and all movement of the dial plate relative to the movement plate and furthermore have designed a fastener in which any force tending to move the said dial plate with relation to the movement plate will be taken up by parts especially designed for that purpose and which will not show signs of wear or allow the dial to become loose during long usage or the repeated removing and replacing of the dial upon the movement plate.

Having thus described my improved dial fastening means, what I claim to be new and original with me is The combination with a watch movement plate with an upper ledge, said watch movement plate provided with slots extending transversely therethrough and with their outer surfaces tangential to the outer surface of the lower portion of said ledge, a dial with wide thin projections rigidly secured thereto equal in thickness to the width of said slots, said plate-like projectheir heads lying flush with the surface of the said projections and tangential with the lower portion of the said ledge, and an annular watch member receiving the restricted portion of the watch movement plate therein contacting with the said projections and with the screw heads, preventing the movement thereof.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

JOSEPH A. F. WVOLF. Witnesses:

LESLIE NEUBAUER, EDWARD F. RUMMELHART.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents, Washington, D. (3. 

